Time Lag Test
TIME LAG TESTIf the shift lever is shifted while the engine is idling, there will be a certain time elapse or lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, direct clutch and first and reverse brake.
CAUTION:
- Perform the test at normal operating fluid temperature (122 - 176°F or 50 - 80°C).
- Be sure to allow one minute interval between tests.
- Make three measurements and take the average value.
MEASURE TIME LAG
a. Fully apply the parking brake.
b. Start the engine and check the idle speed.
Idle speed (N range): 700 rpm
c. Shift the shift lever from N to D position. Using a stop watch, measure the time it takes from shifting the lever until the shock is felt.
Time lag: Less than 1.2 seconds.
d. In the same manner, measure the time lag for N R.
Time lag: Less than 1.5 seconds
EVALUATION
a. If N->D time lag is longer than specified:
- Line pressure too low
- Forward clutch worn
- O/D one-way clutch not operating properly
b. If N->R time lag is longer than specified:
- Line pressure too low
- Direct clutch worn
- First and reverse brake worn
- O/D one-way clutch not operating properly